Regenerative coke oven



RENEWED MAY 11.1921.

n IS @ci ...o covww `Q J. E. HUBBELL.

HEGENERATIVE COKE ovEN.

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Patented Jail. 10, 1922.

5 SHEEIS-SHEE' 2.

XML@ i. /Mff l. E. HUBBELL.

REGENERATIVE COKE OVEN.

APPLICATION msn DEc.21.1918. RENEwED MAY 11,1921.

1,402,770. Patented Jan. 10, 19221 W///ff// I L 3 n ve n rofl 1. E. HUBBELL.

REGENERATIVE COKE OVEN. APPLCATION FILD DEC.27. 191B. RENEWED MAY 1l, 1921.

Patented Jan. 10, 1922.

J. E. HUBBELL. REGENERAIVE COKE OVEN. APPLICATION FILED 0m21.191s. RENEwED MAY II, 1921.

Patented Jan. 10, 19227.

5 SHEETS-SHEET 5.

SNn bNINI i O .r. /V m M u QNINII/ IIQNI WW du JM rw UNITED [STATES PATENT OFFICE. f

JOHN LEUBBEIL, F NEW YORK, .N. Y., ASSIGOB, :BY DIRECT AND mNE ASSIGN- MENTS, 0F ONE-THIRD T0 LOUIS vWILPU'JPJJI?. AND TWO-THIBDS TO ALICE A. WIL

Puma, 30TH or NEW vnocininnn, NEW Yonx. i nnonnmmrvn conn ovEN.

specification of Letters Patent.

.Patented J an. 10, 1922.

Application .led December 27, 1918, Serial No. 268,479.. i Renewed vHay 11`,y 1921. Serial No. 468,727.

` To all t ma concern:

Beit known t at I, .JOHN E. HUBBELL,

* a citizen of the-United States, and resident 'and State of in the county of New York ew York, have invented certain new vand useful Improvements; in Reof rvNew Yor generative Coke Ovens, of which` theciollow-V i is a specification: o l

y present invention relates prlmarlly to regenerative .coke ovens ,of the W ilputte t pe, examples ofwhich are illustrated in `lgatent No. 1212866, granted January 16,

1917, to Louis Wilputte. l A

In this type of coke oven the heatlng walls bers of the battery are each provided with a plurality of vertical iiues whlch are conf nected at their upper ends by a horizontal channel, and are connected at then' lower ends to a correspondingl plurality vof regenerators. `In practice.v the regenerators connected tothe iiues of'each heating wall are` arranged in a row running lengthwise of the heating wall and located below the level ofk the latter, there being an individual connection between each regenerator and the corresponding vertical flue. There may thus be anindividual regenerator cell for each vertical heating fiue in the oven battery, or lthe -regenerators may extend vlongitudinally of A.the oven battery ;that is, transversely to the through. This improved arrangementcomlengths of the heating chambers and coking chambers, in which case each of these longitudinal regenerators isconnected toa corresponding vertical flue in each of the various heating walls.

The general object of my invention is to provide improved means for regulating the distribution of gaseous fiuids iowing through the renegerators and heating fiues to which the latter are connected. One specific object of the present invention is to provide an im.- proved arrangement of conduit connections to the bottom sides of therregeneratorafacilitating themaintenance of the pressure conditions in the different regenerators necessary to the desired distribution of flow prises conduit connections for regenerators adjacent the center of the battery, which are di'l'erentfrom the conduit connections for the regenerators adjacent the outer sides of tions' of operation.- chamoven h aving longitudinal `Thlsobject I attain by providing each of the batteries. With thisl arrangement I am able to compensate in a very satisfactory manner for the tendency, resulting from variations in static and dynamic pressure conditions in the upper horizontal channel and 1n the bottom conduits, to concentrate the upiiow in the on regenerators nearest the permits of a ready adjustment of the relative pressures maintained' in the inner andA outer regenerators to meet varying condi- A second specific object `of the-invention is lto equalize the pressure condition along the lengths of regenerators in a` Wilputte regenerators.

the longitudinal regenerators withan indivldual unobstructed sole channel, Associ .ated with these sole channels arex outlet condults 'whichiare parallel to the oven cham-k bers and heating walls, and extend into the battery from `its opposite. sides. Each ofv the regenerator sole channels is connected at distributed points along its length toa num- Aber of these conduits.l The sole channels are of `ample cross section to permit suchv iiow longltudinally of the regenerator asis required to aifect aproper distributionof the gaseous lulds flowing through each of the Iegenerators/ Special constructions which I so l have. devisedA for accomplishing the second c mentioned specific object of my invention serve also to accomplish the first mentioned s ecific object of my invention in .a desira le manner.

`The various Vfeatures of lnovelty charac-A terizing my invention are pointed outwith particular-ity in the claims annexed to and forming a part of this specification. For a better understanding of my invention,l however, the advantages possessed by it, and varionsv special objects attained by its use, reference should bemade to the accompanying drawings and descriptive matter, in which I have illustrated and described preferred embodiments ofmy invention.

0f the drawings:

Fig. 1 is a sectional elevation of a coke oven, the right hand portion being in section on the broken lline 11^ of Fig. 3, the major art ofthe left hand portion ofthe figure being in section on the broken line 1--1B of Fig. 3, and the lower left hand corner of the figure being in section on the brokenline 1C to 1C of Fig. 3.

Fig. 2 is a view taken similarly to the right hand portion of Fig. 1, but on a larger scale and showing asmall portion of regenerator construction and the externa-l connections thereto.

Fig. 3 is a section, the right hand portion of which -is taken on the line 3--3 of Fig. 1, while the left hand portion is taken on the line 3A-3A of Fig. 1. v

Fig. 4 is a partial plan, in section on the line 4-4 of Fig. 1. f

Fig. 5 is a. partial section-taken similarly to Fig. 3, but on a largerscale and illustrating a modification.

Fig. 6 is a partial section taken similarly to Fig. 5, showing a second modification.

Fig. 7 is a partial section taken similarly to Fig. 5, showing a third modification.

Fig. 8 is a view taken similarly to Fig. 5, showing a fourth modification.

Fig. 9 is a partial plan in section on line 9--9 of Fig. 8. l

Fig. 10 is a partial section taken similarly to Fig. 5, illustrating the application of one feature of my invention of a Wilputte oven having individual cell regenerators for the different heating flues.

In the drawings, and referring first to the construction shown in Figs. 1-4 inclusive, wherein I have illustrated the application p of my invention to a Wilputte coke oven having longitudinal-regenerators As shown `,in these figures, the oven comprises, hori.

jzontal coking chambers A, alternating with heatingwalls A', provided with vertical heating flues, the various vertical fiues in each heating wall being connected by the usual upper horizontal channel C.- It will be understood that in ordinary practice there are usually forty orl morev coking chambers in each battery. The various vertical flues in each heating wall may be, and are shown as identical in construction, but for convenience are desi nated in groups by the reference symbols B', b, b As shown each of these flue groups comprises approximately, but not exactly, one fourth of all the vertical flues in each heating wall. The different vertical fiues in each heating wall are connected each by a corres ending port D to a corresponding' lon itu inal regenerator E beneath the fiue. s shown, each longitudinal regenerator chamber comprises portions formed by openings A3 in the so called pillar walls A2 beneath the heating walls A1, and communicating portions between the pillar walls and bounded at their sides by walls A* extending transversely to the pillar walls A2. At one end of the battery sole channel bricks stacked in the pillar wall openings.

each regenerator space comprises also a portion A3 in the battery end wall which is similar in shape to the pillar wall openin s A3.

he checker brick E in each longitudinal regenerator is so piled, and the bottom wall of the regenerating chamber is so formed as to provide an open sole channel El extending the full len th of the battery. Above the 1 the checker brick in each regenerator is piled to form a continuous pervious mass extending from one end of the -battery to the other. In some of the figures of the drawings, for convenience, only a portion of the checkerbrick is shown. Advantageously each sole channel E1 is of the same width as the pillar wall openings A3 except that, for constructional reasons, each channel E1 is shown as slightly restricted in its pillar wall opening portions by the inclination of the side walls of the latter as indicated at A5 to provide supporting ledges for the bottom row of checker- Extending into the battery structure from its opposite'sides are waste heat outlet conduits G, G, g and g. The conduits G, which extend into the battery at the left hand side, as seen in Fig. 4, for approximately one quarter of the width of the battery, are connected to the sole channels E1 ofthe regenerators, which are connected at their upper ends to the lues B. All of the conduits G, except the right hand one as seen in Fig. 3, are connected to the corresponding sole channels E1 by inclined ports H, which open at their lower ends at the sides of the conduits G and o en at their upper ends to the sole channel 1 centrally of the openings A3 in alternate pillar walls A2.

For structural convenience, the `conduit G at the right hand end battery, as seen in Fig. 3, is connected to the sole channels 'E1 above it, by vertical ports A1o through the top wall of the conduit. The conduits G1, 110 which alternate with the conduits G and enter the battery from the same side, extend to the center of the battery and are connected by ports H1 similar to ports H, to the sole channels E1 of the regenerators 115 havin their upper ends connected to the flues l The ports H1 are similar in shape to the ports H and open at their upper ends into the pillar wallpenings A30 and A3 in rows of said openings alternating with the 120 rows of such openings into which the ports H open. The channels g which are in line with the channels G and extend into the battery from its right hand side as seen in Fig. 4 are connected by ports h to the sole 125 channels E1 of the regenerators connected at their upper ends to the lues b. The conduits g' which alternate with the 'conduits g are connected by ports k to the sole channels E1 of the regenerators E connected 1`30 tension vKwfcontrolling a port K1"'through` to the sues- 17:1-irni,peasi and' a', are

shown aS similarjingform-to the ports vH and H'.

The llow .I-I, etc.,

connecting theiconduits H, vH, h and h' to the corresponding regenerator sole channels should 'f be carefully f proportioned to. secure the proper vlflow .restrictlng and regulating effect.` In practice I prefer yto laccomplish this I by usebicrifce".plates J which* may advantageously be,` ormed ofcast iron, one

of thesev plates J rbeingreceived in a recess formed' in the bo'tto'n'lvwall of the, corresponding channel E1 at'the y ch "orifice member J has an orifice oit. measured diameter, and smaller in cross sectionthan vthe 'brick work portionof the port of which it. for'msa part. Extending into the coke oven battery from its opposite sides arebrickwork channels I. These channels, which are located below the regenerator and run to the center ot the battery, are arranged in end to end pairs,y

and close communication between `the channels M and m, respectively, and the stack outlet Mm.V The tunnel Ml is connected at the end of the. battery lby, a branch P, to the outlet Pp of ablower or other source of an' under pressure'. Similarly the -tunnel m is connected to the air source Pp by a branch tunuel p. The flow through the branch tunnels P and 'p is. controlled by valves Qv and f vQ respectivel- The outer end vof each of the conduits and G is connected b a corresponding valve to the tunnel and each vof the condults g and g is connected by a similar valve K to the tunnel Each.

valve K comprises "a valvememberK1con trollmg communlcatlon '-between the ,correjsponding wastel heat conduit and the' corre spending tunnel. M or{m,'and as shown, each valve memberl K1 1s providedv with an exwhichthe tunnel ris connected toan air pipe,

I adjacent the valve, the 'arrangementbemg such 'that eachof` the-tunnels M and m is alternately connectedto the correspond-y. lng air vpipes I1 and' to the correspondingl waste heat channelsl G and G'v or g and i.'

Thefvalve members K",a'ndthervalves O, O', Q and; Q are connected to suitable re'-v lipper end of each ofl a pipe I1, having carefully propor-l 1 versin mechanisms, not shown, and valves (nots own and also connected to a revers-` y ing mechanism),k are provided for controlling the supply of combustible as to the usual-gas guns or channels R. he chanlnels R, are connected to Athe various vertical -ilues B, B', b and b by ports R' and the -usual removable gas nozzles R2.

. In opera-tion, and assuming the stage of operation in which combustion is being ini'- bers K1 of the valves K at the right hand side of the battery, as seen in Fig. 4 will be closed, and the valve members K1 of valve K- at the leftl hand side of the figure will'be open. At the same time thevalves O andl Q will be open, and the valves O' and Q will be closed. Air then passes from the airj supply source 11am-'through the branch p and tunnel m to the valves K atthe right hand side of the battery and through the tiated inthe 'lues b and b', the Avalve memthen open ports K2 of those valves into the air-pipes I supplying air lto the solechannels E1 of the regenerators E connectedA to Ithe iiue b and b; at the time combustible gas is supplied tothe luesb and b' through the corresponding `ports R?.

the flues b and b' of each heating wall, .pass

- out of thelatter into the upper horizontal channel Cthrough which the products of corresponding VlluesB an B'. After descending through the ilues. B and B", the

products of rcombustionv enter the ,upper ends of the corresponding regenerators EV through the `ports D, andv after 'passing' through -the' checkerbrick of "the, regenerae The air and gas uniting in combustion incombustion pass to the ul per endof the' v torsunder'the flues Band B', andnthereby 1 lbeing cooledl while-'heating the re enerators of those regenerators, From the sole channels E of i .these then off regenerators, the products of orts, I-I, H'|` e.

up,`pas's into thefsole channels combustionv pass through the v and H1 to the conduits G andA nr and thence through the corresponding valves Kto the tunnel M and through the latter t the stack outlet Mm. In the following stage of operation, the valves are'shifted to reverse the` ucts of combustion-then escaping from the oven structure proper through thechannel's l ,g andg' and'tunn'el m; v

The provislon of separate outlet g conduits j G and G' or g and g'fyforthe outer and inf ner portions of each set ofA regenerators lisn which the direction of iow atanyinstantis the same, ives aca acity for regulation. g (l) A125V heretoforeff vantageous and from'A which is practically-a A Va practical standpoint, has not been obtainable.

f This capacity for regulation resultsl from the ability to vary the draft suction applied to the outer regenerators as compared to that `flow, combustion then beinginitiated at th'eLl'I bottoms of the flues B and b, andthe prod-f applied to the inner regenerators. This variation in suction effect may be obtained b a mere adjustment of the usual dampers provided in the casings of the correspond-v ling valves K. By thus varying the suction applied to different regenerators it is possible to substantially compensate for the disturbing elfects on distribution of the static and dynamic pressure conditions prevailing in thel upper horizontal channel C, and in the waste heat conduits G, G and g, g'.

vIn the upper horizontal channel C, for instance, the total pressure is the same from one end of the channel to the other, but this totalpressure comprises static and dynamic components which vary inversely. At the -ends of the channel the dynamic pressure component is zero, while at the center of the channel, that is, at the point midway between the inner Hue b and b the dynamic pressure component is a maximum. The y static component, disregarding friction losses, vvaries from the same maximumA at each end of the channel to a minimum at the center of the channel. Similarly in the waste heat conduits G and G', etc., the dynamic pressure increases and the static pressure diminishes with the increased volume of flow from the inner to the outer end of the portion of each conduit into which there is a 4distributed inflow. The controlling pressures determining the volume of flow downwardthrough any vertical lue B, B and b or b are the static pressure in the channel C at the top of the flue, and the static pressure in the regenerator to which the lower end of the flue is connected, and the `regenerator pressure depends in turn upon the static pressure at the outlet ports leading from the sole channel E of the regenerator into the waste heat conduits to which it is connected by those ports. In

4consequence of the described static pressure variations 4in the horizontal channels C and off-take conduits there isa tendenc to concentrate the downflow in the vertical ilu'es at the outer sides of the battery. as coinpared with the vertical iiues adjacent the center of the battery. This tendency can be substantially minimized with ease in "the apparatus described, by so setting the damper-s that the draft suction in the conduits G and g is greater than itis in the conduits G and q. The regulation thus obtained may be for each set of regenerators through which the flow at any one instant is in the saine direction. With the two sets of connections shown, it is possible to pass down through each of the groups of lues B, B', b or b the exact portion of the downflowing gases which should pass through that group of lues. Furthermore, those skilled in the art will understand that an error of a given magnitude in proportioning the orice members J for the group of regenerators connected to thel outlet conduits G, for instance, to meet a given operating condition, will result in a maximum fault in distribution which is but a fraction (approximately one-fourth) of the fault which a corresponding error in vproportioning orifices would create if the regenerators connected tothe 'lues B were also connected to the conduit G.

The proper distribution of theup-flow through the regenerators and vertical heating ilues is 4no less important than the regulation of down flow, andseparate air supply conduits 'for different groups of regenerators may be lrovided as shown in Figs. 8 and 9 hereinafter referred to in more detail. Such a multiplication of air supply pipes will ordinarily be found unnecessary, I believe, because of the comparative ease with which the pipes 'I' may be withdrawn and their discharge orifices enlarged by reaming or be partially plugged if the necessity for such adjustment arises. Moreover, changes in operating-conditions do not materially alter rvthe tem erature conditions in the air supply pipes I as they may in the waste heat channels. In the drawin s I have shown the usual slide bricks at the upperends ofthe vertical iues which may readily be used if considered necessary or desirable though I believe them to be unnecessary in a well designed oven having the other regulating provisions disclosed herein. Removable and replaceable throttling devices C2 which may be, and are Shown 1n Fig. 1 as consisting of bricks or like refractory blocks, may be placed in each horizontal channel C at the llow reversal plane to form means by which the relative volumes of flow in the diieient heating walls may be varied. The pro-v checker brick in the pillar wall openings and hence to increase the regenerating effectiveness of the latter. The provision of the ports opening centrally from the bottoms of the pillar wall openings also facili'- tates an arrangement of ports which are create av more active flow through the.

- size if 'nessa in lengt leadin similar in shape and length and hence tend to equalize the flow through the various ports' ,of each regenerator. The modified construction'shown in Fig-5 differs from that shown in Figs. 14 only `in the shape of the ports` HA connecting the regenerator sole'v channels to `the waste heat conduits.

As shown in Fig.4 5, each port HA is elbow shaped, comprising a horizontall branch from thev side of the waste heat channe in which ma be placed a regulating orice member w ich may be removedA andreplad by one of a different y In the modilibation shown in Figs. 6 and 7 e the longitudinal regenerator lsole channels E are formed in the masonry' below the air vsupply channels I land the' waste heatchannels G1 and G11. It will be understood that in th'e construction shown in Fig. 6 the channels G1 and G11 correspond h to channels G and G'" respectively ;v

connected by ports Gr12 to the sole channels E10 of the regenthe channels G1 being craters adjacent the outer sides of the battery, whilethe channels G11 lare connected by ports G13 to the sole channels E10 of the inner regenerators. -Each sole channel E1 -is connected to the regenerator chamber above it by vertical channels H10 leading downwardk from the centers of the pillar v is `one short :waste heat. channel, G1*s and wall portions Aa of the regenerators. With the arrangement shown in Fig. 6 it is lpossi-v ble to provide removable orifice members, JA, or slide'bricks for regulating the ilow through` the ports G and G".

In the construction shown in Fig. 7, there one long waste heat channel G" foreach four'heating walls. -In'Fig. 7, ports His ,in the top wall of each sole channel El are connected bybifurcations H16 to the central portion of each of the pillar wallopen-j ings A above the sole channel. Withthis arrangement, as with that shown in Figs. 1-6, the paths of ow from the portions of `the regenerator s ace at the opposite ends of each pillar Wa l opening.l Atto the `near,` v est waste heat channel, .are similar'in' shape and in. length. In Fig. 7, `the' discharge i ports 'from the air supply channeLIopen, into the vertical upper ortions'Hl3 rof the',l passages leading to 1 e`.1wasteheatingl channel. v In the arrangement pillar wall open into the which it need not dilferexceptin sdffar the arrangement of `wast'ehdait ,channelsfis concerned. The construction shownin shown in Figs.l 8 and 9, ther ports leading toathelong and vshort` waste heat channels at opiposite sides of a, y owerl end-of', the

` openings-f AJ'in --that pillar wall: {Thi's' arrangementof waste heat channels slightly simplifies the 'brick'. work, as compared, wit z the arrangement shown in, Fig. 3, frein!- 8 vis usable without special construction of waste heat channels at the ends of the battery in case there is an odd number ofv coking chambers and an even number of heat` ing chambers in the battery.

In Fig. 8 the air pipe channels other than the two channels at the opposite ends of the battery are divided into separate channels for inner and outer groups of=`regenerators just as are the waste heat channels. v As shown the intermediate air supply channels IA are connected to the 1.egene1ator l sole channels E1' by bent ports, 12, opening to the air channels at the 4sides and opening to the regenerator sole* channels at lthe bot-v toms of the openings Aa in the pillar walls intermediate of the pillar walls intoiwhich the oftake ports H etc. open. At the ends of the battery the air pipe channels run to the centerol the battery and are each connected to allY o f the regenerator sole channels above it. f

In Fig. 10 I have illustrated the appllcation of the divided waste heat channel feature of my invention to a Wilputte oven of the type in which there is an individual cell regenerator EA foreach verticalflue. In this arran ement there are beneath `each row of `cel regenerators 'extending trans-f versely ofthe battery a pair of waste heat channels G*o and a pair of waste heat channels Gro. The two channels Gr40 of each pair extend into the .battery from its opposite sides'and each of these channels is connected t0 .approximately one uarter of the regenerators by ports G41. he two channels Go underneath each row or regenerators also ex tend vinto the battery from its opposite sides and run tov the flow reversal plane and are connected by ports G51 'to the intermediate f..regenerators. An aligned pair of supply channels IB is-interposed between thejc annels Gr40 and 1G50 underneath each row lof regenerators, each air supply channel running from vtheouter edge of they battery to the flow reversal plane` and being connected l to the regenerators above it by orts I.

'- '.While accordance with t e' provision' r v scribed the g bestembodiments; of my invenart'- will lunderstand that lchanges setforth. in the. appendednclaims, and that certaink features o timesnbeused to advanta'g -llnesfconnectedattheir upper. ends, andliav-, .elityl:tof-eseaerwrsi `severely connected to the lower ends of said lues and forming two sets, one at each side of a central flow reversal plane and with the regenerators in each set all on or all off at the same time, the improvement which consists in separate conduit connections for groups of regenerators of each set located at dilerent distances from said flow reversal plane. y f

2.. In a cokel oven having a heating wall formed with a plurality of vertical heating flues connected at their upper ends, and having a plurality of regenerators separately connected to the lower ends of said lues and forming two sets, one at each side of a central flow reversal plane and with the regenerators in each set all on or off at the same-time, the improvement which consists in separate off gas outlet conduits for groups of regenerators in each set located at different distances from said flow reversal plane. v

3. In a coke 'oven battery comprising a lurality of horizontal coking chambers and' intervening heating walls extending transversely of the battery with eachof said heating walls formed with a plurality of vertical heating lues connected at their upper ends, a plurality of regenerators extending longitudinally of the battery and corresponding in number tothe number of flues in each heating wall and each separately connected to a corresponding Hue in each of the heating walls and forming twosets, one at each side of a central flow reversal plane and with the regenerators in each set all-on or oli at the same time, the improvement which consists in conduit connections to the bottom of the regenerators, said connections extending transversely of the battery and being separately connected to grou s of regenerators of each vset located at di erent distances from said ow reversal plane.

4. In a coke oven battery comprising a plurality of horizontal coking chambers and intervening heating walls extending transversely of the battery, with leach of Said heating walls formed 4 with a plurality of vertical heating flues connected at their uper ends, a plurality of regenerators extending longitudinally of the battery and corresponding in number to the number of iues in each heating wa1l,'and each separatelyv connected to a corresponding flue in eachof the heating walls, the improvement which consists in a separate unobstructed sole channel for each regenerator extending longitu'- .wall openings.

dinally of the battery. 5. In a coke oven plurality of horizontal coking chambers andv intervening heating walls extendingtransversely of the battery, with `each of said'k heating lwalls formed with aplurality of vertica heating flues connected at their upperv ends, a plurality of regenerators extendbattery comprising a j ing longitudinally of the battery and corresponding in number to the number of ilues `in each heating wall and each separately connected to a corresponding liue in eachof the heating walls, the improvement which consists in a separate unobstructed sole channel for each regenerator extending longitudinally of the battery, and conduits extending transversely of the battery and connected to the regenerato'r sole channels at intervals along the lengths of the latter.

6. A coke oven battery having horizontal coking chambers and intervening heating walls and subjacent pillar walls all extending transversely of the battery, saidpillar walls being formed with openings and being connected by partition walls, transverse to the pillar walls to provide a plurality of regenerator chambers extending longitudinally of the battery and containing checker brick, with said chambers so shaped and the checker brick so disposed therein as to provide an unobstructed sole channel for and extending through the pillar wall openings of each of said longitudinal regenerator chambers.

7. A coke oven battery having horizontal coking chambers and intervening heating walls and subjacent pillar walls all extendng transversely of the battery,- said pillar walls being formed with openings and being connected by partition walls transverse to the pillar Walls to provide a plurality of".

regenerator chambers extendingv lon tudinally of the battery and containing c ecker brick, with said chambers so shaped and the checked brick so disposed therein as to provide an unobstructed sole channel for,v and extending through the pillar-wall openings of each` of said longitudinal regenerator chambers, and conduit connections to said sole channels extending transversely of the battery 'and connected to said sole channels by ports leading downward from the latter ing-connec ed by artition walls transverse to the pillar twal s lto provide' a plurality of regenerator chambers extending lon 'tudinal neath. the regenerator chambers and condownward throughthefloors of thepillar 9. A coke oven battery coking chambers and intervenin heating wallsandsubjacent illar walls a y of the battery, conduits locate be-A having horizontal extend- 12o i' nected to said chambers by ports leading'v ing transversely of t e battery, said illar.

vwalls being formed with openings vand 'eing lconnected by artition walls transverse to regenerator chambers extending longitudinally yof the battery, conduits located beneath the regenerator chambers and extending transversely of the battery between the illar walls, and connected to said chambers y ports leading downward through the floors of the pillar wall openings.

10. A coke oven battery having horizontal coking chambers and intervening heating walls and subjacent pillar walls all extending transversely of the battery, said pillar walls being formed with openings and being connected by partition walls transverse to the pillar wall openings to provide a luralit of regenerator chambers, exten ing longitudinally of the battery,- conduits located beneath the regenerator chambers and extending'transversely of the battery between the pillar walls and connected to said chambers by ports through the floors of the pillar wall o-penings, one conduit of each adjacent pair of said conduits being connected to'a group of regenerators adjacent the outer face of the battery, and the other to a group of regenerators adjacent the center of the batter In a coke oven battery comprising a lurality of horizontal coking chambers, and intervening heating walls extending transversely of the battery, with each of said heating walls formed with a plurality of vertical heating llues and an upper horizontal channel to which the upper ends of the vertical flues are connected a plurality of regenerators extending longitudinally of the battery and corresponding in number to the number of flues in each heating wall and each-separately connected to a corresponding fluein each of the heating walls, and forming two sets one at each slde of a cen-r trall How reversal plane with the regener` ators in each Set all off or all on at the same time the improvement which consists in means for separatel throttlin the various horizontal channe s each a jacent the flow reversal plane. v a t 12. In a coke oven having a series of horitral flow reversal leading downward space between each pair of supporting walls y into a plurality of regenerator chambers separately connected to the lower ends of the ilues in an adjacent heating wall and forming two sets one at each side of a cen lane withmthe regenera tors 'in each set al on or all off at the same time, the improvement which consists in separate conduit connections for groups of regenerators of each set located at different distancesA from said flow reversal plane.

13. In a coke oven havin a series vof horizontal coking chambers an a series of heating walls alternating with the coking chambers and each formed with a plurality of .vertical heating flues connected at their .up-

per ends and supporting walls beneath and parallel to the heating walls and walls transverse to the supporting walls dividing the space between each pair of supporting walls intb a plurality of regenerating chambers separately connected to the lower ends ,of the flues in an adjacent heating wall and forming two sets one at each side of a central flow reversal lane with the regenerators in each set al on or all oil at the same time, the improvement which consists in separate condult connections for groups of regenerators of each set located at different distances from said flow reversal plane, said conduit connections being parallel to and extending between said supporting walls. l

Signed at New York city, in the county of New York and 'State of New York this 26th day of December, A. D. 1918.

JOHN E. HUBBELL. Witnesses: THOMAS F. KILROE, Jr.

' MARIE McDnvE'rr. 

